Porogamy is entry of pollen tube into ovule through the

Entry of pollen tube into the embryo sac is under......... guidance.

The precautionary measures in artificial hybridization is/are

Double fertilization was discovered by Nawaschin and Guignard in

The cells of the endosperm are filed with reserve food materials and are used for the nutrition of developing embryo is generally a ............ in angiosperms.

In embryogeny of dicot plants, the suspensor cell undergoes transwerse divisions forming susperisor which is

The remains of second cotyledon occur in some grasses. It is called